Suction burner control



July 8, 1924.

J. H. HUNT SUCTION BURNER CONTROL Filed June 23. 192] 5 Sheets-Sheet l MZ H5555 July 8, 1924. 1

J. H. HUNT SUCTION BURNER CONTROL 1921 5 Sheets- Sheet 2 [P11/anis? Filed June 23,

luly 8 1924.

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Patented July* 8, 1924.

UNITED v OFFICE.

JOHN H. HUNT, OF DAYTON, OHIO, ASSIGNOR T, THE DAYTON ENGINEERING LABORA- TORIES COMPANY, OF DAYTON, OHIO, .A CORPORATION OF OHIO.

SUCTION BURNER CONTROL.

Application led .Tune 23, 1921.

To all whom t may concern.'

Be it known that I, JOHN H. HUNT, a citizen of the United States of America, residing at Dayton, county of Montgomery, State of Ohio, have invented certain new and useful Improvements in Suction Burner Control, of which the following is a full, clear, and exact description.

This invention relates to liquid fuel burners for heating the intake of an internal combustion engine and particularly to the type of burner disclosed in the copending joint application of Hunt, Fitzsimmons, and Embshoii', Serial No. 484,049, filed July 12, 1921. In said application there is disclosed a liquid fuel burner including a combustion chamber surrounding the engine intake and from which the products of combustion of the burner may pass through small holes in the side of the intake. The burner is therefore subjected to engine intake suction, and means responsive to said suction are provided for supplying a fuel mixture to the burner.

In application Serial No. 470,981, vled May 19, 1921, by Hunt and Fitzsimmons a similar type of burner is disclosed, and the suction in the burner is controlled automatically .by' means of an automatic valve controlling the admission of combustion air to the burner.

In the Apresent invention, one of the objects is to control the suction in the burner by controlling the passage from the burner combustion chamber to the engine intake either manually, automatically or both. The automatic control of this passage is chiefly to limit the variation in burner suction over a relatively widerange of in take suction so as to economize fuel and to better control the proportions o4 fuel miie ture sucked into the burner. The manual control of this passage will limit the range of operation of the automatic control and will close the passage entirely so that the burner d may become inoperative when desired. t l

Other and further objects of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred embodiment of the present invent-ion is clearlyshown.

In the drawings: Y Y Fig. 1 is a side elevation of a carburetor Serial No. 479,764.

and fragment of an engine intake between which appears a side elevation of a burner including the present invention;

Fig. 2 is a sectional view of the fuel metering well shown in side elevation in Fig. 1;

Fig. 3 is a horizontal sectional View of the-burner taken on line 3-3 of Fi 1;

Figs. 4 and 5 are plan and sectiona views, respectively, of a member for manually controlling certain parts shown in Figs. 1 and 3, and

F ig. 6 is a vertical sectional view of the A 1 burner taken on the line 6-6 of Fig. 2.

In the drawings, the carburetor with which the burner is used ,may be any type, but the carburetor 2O shown in Fig. 1, is the type generally used with the Buick a well known make of automobile. Carburetor 20 includes an intake 21 for air which sucks fuel' from jets 22 and 23 supplied by a bowl 24. The fuel mixture passes up through passage 25 through a tube in the burner combustion chamber to be described and into the engine intake pipe 26.

There is attached to the bowl 24, a fuel metering device 30 including a body 31 communicating with bowl 24 through air passage 32 and fuel passage 34, thenormal fuel level being at line 35. Within body 31 is a metering well 36 'having a metering hole 37 and a bleeder hole 38. A'collar 39 supports upon the well 36 a tube 40 havingA a metering hole 41 and a sideV hole 42; an tube 40 extends above 39 into a nipple 43 having air holes 44. Nipple 43 is connected by pipe 45 with nozzle 50 supported by the burner body 51 which in turn is mounted on burner heated chamber or ada ter 52.

Nozzle 50 includes body 53 aving a mounting fiange 54 and a shank 55, and

having a central bore 56 with a restriction 57. Bore 56 communicates with 45 through an inlet passage bored through the boss 58 (Fig. 1). Nozzle insert 59 having a bore 60 and side holes 6i is mounted within the bore 56. Air' for combustion is admitted through passage 62 controlled by screw 63 into air distributing chamber 64 from which air passes into burner combustion tube 65 through holes 66. Burner body 51 is tap ed to receive spark plug G7 and a bubbler p ug 68 having puddle cavity GSI-and bubbler hole 70. 71 is a mica observa-tion Window cec-sed at 7 3 so that the shank 55 of nozzle body 53 may extend across passage 62 but air may pass around shank 55 on its. way to chamber 64 thus cooling the nozzle.

The burner adapter 52 provides a chamber surrounding a cylindrical wall enclosing a passage 81 forming a continuation of the carburetor outlet 25 and leading into intake 26. Vall 80 is provided with hole 82 controlled by a valve 83 which projects through and is attached to a diaphragm 84 which is supported between diaphragm box 85 and diaphragm box cover 86. The box and diaphragm 84 provide a diaphragm chamber communicating with the engine intake. Box 85 includes a shank 87 attached to adapter 52 and extending therethrough and provided with a central bore 88 which is restricted at 89 to guide the valve 83. Valve 83 fits loosely within restriction 89 so that the box 85 is subjected to burner suction. Screws 90 passing through ears 91 secure the box 85 in osition. Screws 92 passing through was ers 93 attach cover 86 to box 85. Cover 86 is provided with an annular flange 86a within which slides and rotates a cup 94 having a handle 95. Valve 83 has a reduced endw96 passing through cup 94 and carries piny 9,7. Spring 98 and washer 99 are interposedibetween pin 97 and the bottom ofA cup 94. 'Cup 94 has diametrically opposite oblique slots 100 cooperating with pins 101 mounted within flange 86a. Thus the cup is manually rotatable and endwise movable with respect to cover 86. Stud 102 is attached to` arm 95 and to this stud is attached a Boden wire 103 which leads through hole 104 in bracket 105 extending from cover 86 to a suitable handle on the dash board of the automobile (not shown).

When the burner is subjected to engine suction fuel and air are sucked together up through pipe 45 to the burner nozzle, air being admitted at 38, 42 and 44, and fuel being admitted at 37 (see Fig. 2), all as particularly described and claimed in the copending application of Hunt, Fitzsimmons and Embshoii' referred to. Theyfuel well shown is particularly described and claimed in the copending application o fllohn H. Hunt and John T. Fitzsimmons, Serial No. 495,024, filed August 24,` 1921. Thi-.is fuel mixture is burned completely on further mixture with more air entering at 62, 64 and 66, and the products of combustion pass out through the hole 82 connecting the heating chamber in the adapter 52 with passage 8l.

Since the box 85 is subjected to engine sucl tion the diaphragm 84 and valve 83 will be moved upwardly (in Fig. 3) more or less according t0 the degree of engine suction thereby tending to maintain the burner suction uniformover a wide range of engine speeds. At least,4 there will be a limitation within reasonably close limits of the range of burn- 82 thereby shutting olf all communication between the burner and the engine. In this manner the burner may be rendered inopertive at will, and without the use of valves in the fuel line leading to the burner.

While the form of mechanism herein shown and described constitutes a preferred form of embodiment of the invention, it is' to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What I claim is as follows:

1. In a heating device for the intake of an internal combustion engine, the combination with an engine having an intake; of a burner including a combustion chamber in contact with the intake and in communication therewith through a passage; means under control of engine suction for supplying the burner with a fuel mixture; and automatic means for controlling the passage between said combustion chamber and said intake in accordance withinta-ke suction.

2. In a heating device for the intake of an internall combustion engine, the combination with an eiigine having an intake; of a burner including a combustion chamber in contact with the intake and in communication therewith through a passage; means under control of engine suction for supplying the burner with a fuel mixture; and manually operable means for controlling the passage between said combustionchamber and said intake, said meansbeing automatically controlled in accordance with engine suction.

3. In a heating device for the intake of an internal combustion engine, the combination with an engine having an intake; of a burner including afcombustion chamber in contact with the intake and in communication therewith through a passage; means under control of engine suction for supplying the burner with a fuel mixture; a valve for controlling said passage between said combustion chamber and said intake; manual means for controlling said valve; and automatic means for controlling said valve in accordance with engine suction.

4. In a heating device for the intake of an internal-combustion engine, the combination with an engine having an intake; of a. burner including a heating chamber in contact with the intake and in communication therewith'through a passage; means under control of engine suction for supplying'the burner with a fuel mixture; a valve for controliing the passage between the. combustion chamber and the intake; a diaphragm attached to e valve; and a diaphragm chamber in communication with the engine intake.

5. In a heating device for-the intake of an internal-combustion engine, the combination with an engine having an intake; of a burner including a heating chamber in contact with the intake and in communication therewith through :a passage; means under control of engine suctlon for supplying the burner with a fuel mixture; a valve for controlling the passage between, the combustion chamber and the intake; vengine suction means for moving the valve to close the passage; and sprin means tending to open the valve.

6. In a heating device for the intake of an internal-combustion engine, the combination with an engine having an intake; of a burner including a heating chamber in contact with the intake and in communication therewith through a passage; means under control of engine suction for supplying the ,burner with a fuel mixture; a valve for controlling the passage between the combustion chamber and the intake; engine suction means for moving the valve to close the passage; spring `means tending to open the valve; and means for adjusting the tension on the spring.

7i In a heating device for the intake of an internal-combustion engine, the combination with an engine having an intake;'of a burner including a heating chamber in contact With the intake and in communication therewith through a passage; means under;l

control of-engine suction for supplying the burner with a fuel mixture; a valve for controlling the passage between the combustion chamber and' the intake; engine suction means for moving the valve; and manual means for modifying rthe operation of the -engine suction means.

8. In a heating device for the intake of an internal-combustion engine, the combination with an engine; of a burner including a part -said valve.

providing a duct for engine fuel, a .heating chamber for the duct and a passage for connecting the heating chamber with the duct; a diaphragm box detachably secured to said part; a valve for controlling said passage supported by said box; and a diaphragm supported by saidbox and connected with said' valve; a diaphragm ox supporting th ,diaphragm and communicating with the engine intake; a spring for tending to move the valve in one direction; and amovable memtber supported by said box for adjusting the tension in said spring. y

10. In a heating device for the intake of,`

box-and movable axially of said valve for adjusting the tension in said spring.

11. In a heating device for the intake of an internal-combustion engine, the combination with an engine having an intake; of a burner including a heating chamber in contact with the intake and in communication therewith through a passage; a valve for controlling said passage; a diaphragm connected with said valve; a diaphragm box supporting the diaphragm and communicating with-the engine intake; a spring for moving the valve in one direction; a diaphragm box cover havingv an annular ange concentric with said valve; a member for resisting spring, said member being rotatably supported by said liange; and means cooperating with the flange and member to cause the member to movc'end'wise when rotated whereby to vary the tension in said spring.' y

12. In a heating device for the intake of fan internalcombustion engine, the combination with lan engine having an intake; of a burner including a heating chamber in con- 'tact withfthe intake and in communication therewith through a passage; a valve for controlling said passage; a diaphragm connected with said valve; a diaphragm box supporting the diaphragm and communicating with the engine intake; a springl for moving the valve in one direction; a diaphragm box cover having an annular flange concentric with said vvalve and provided' with a pin extending transverse to said valve; and a member for resisting said spring, said member being rotatably aupported by said flange `and having a spira-l slot engaged by said pin whereby rotation of said member will produce endwise movement thereof to vary the tension in said SpringV In testimony whereof I hereto aix my Slg-nature. i

' VJOHN I-I.V HUNT. Witnesses: l

H. E. SoLLENnRGrR, l'nvIN A. GRnEgywaLD. 

